Shaft coupling



FIG. 1 is an upper front perspective view of a shaft coupling;

FIG. 2 is a lower back perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a schematic cross-sectional view thereof taken along line 9-9in FIG. 3;

FIG. 10 is a schematic cross-sectional view thereof taken along line10-10 in FIG. 3;

FIG. 11 is a schematic cross-sectional view thereof taken along line11-11 in FIG. 3;

FIG. 12 is a schematic cross-sectional view thereof taken along line12-12 in FIG. 7; and,

FIG. 13 is an upper front perspective view showing the shaft coupling ina state of use in which two shafts connected by the shaft coupling areshown by broken line for illustrative purpose only and form no part ofthe claimed design.

CLAIM The ornamental design for a shaft coupling, as shown anddescribed.